Benchmark: substring vs split datetime

Script Preparation code:

var year = '2004 ';

Tests:

split
console.log(year.split(' ')[0]);
substring
console.log(year.substring(0,4))

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
split
substring

Fastest: N/A

Slowest: N/A

Latest run results:

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Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):

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Let's break down the provided JSON and explain what's being tested.

**Benchmark Definition**

The benchmark is designed to compare the performance of two JavaScript methods: `split()` and `substring()`. Both methods are used to extract a portion of a string. However, they differ in their approach:

*   `split()` splits a string into an array of substrings based on a specified separator.
*   `substring()` returns a new string that contains a subset of characters from the original string.

**Options Compared**

The two options being compared are:

1.  `split()`
2.  `substring()`

Pros and Cons of Each Approach:

*   **`split()`:**
    *   Pros:
        *   More flexible, as it can handle multiple separators.
        *   Can be used to split strings into arrays for further processing.
    *   Cons:
        *   May incur additional overhead due to the creation of an array.
        *   Less efficient than `substring()` for extracting a single substring.

*   **`substring():`**
    *   Pros:
        *   More efficient, as it only extracts the desired substring without creating unnecessary intermediate results.
    *   Cons:
        *   Less flexible, as it requires specifying both the start and end indices explicitly.
        *   May be less suitable for splitting strings into arrays.

**Library Usage**

In this benchmark, no libraries are used. However, if a library like `lodash` or `Array.prototype.at()` were used, they would provide additional functionality to simplify the string manipulation. For example, `lodash's` `split()` function can handle multiple separators and is more flexible than the built-in `split()` method.

**Special JavaScript Feature or Syntax**

There are no special features or syntaxes being tested in this benchmark. The test cases only involve standard JavaScript methods: `console.log()`, `var`, `substring()`, and `split()`.

**Other Alternatives**

If you wanted to compare the performance of other string manipulation methods, some alternatives could be:

*   Using `String.prototype.slice()` instead of `substring()`.
*   Comparing the performance of `join()` against concatenation using the `+` operator.
*   Testing the efficiency of regular expressions (`RegExp`) versus simple substring matching.

By testing different approaches to string manipulation, you can gain insights into which methods are most efficient and suitable for your specific use case.

Related benchmarks:

substring vs split datetime (version: 0)

Comparing performance of: split vs substring

Created: 3 years ago by: Guest

Jump to the latest result

split

substring

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):